let A= is a vector and u=. how can v find A as sum of vector || to u and prep. to u

Question

let A=<1,2> is a vector and u=<2,1>. how can v find A as sum of vector || to u and prep. to u

anonymous · Answer

any thoughts?

anonymous · Answer

Did I miss what you were going to write? I know its a confusing one...

anonymous · Answer

http://www.engin.brown.edu/courses/en3/Notes/Vector_Web2/vectors5/Vectors5.htm scroll down to section 5.5

anonymous · Answer

That does not answer my question...does it?

amistre64 · Answer

"let A=<1,2> is a vector and u=<2,1>. how can v find A as sum of vector || to u and prep. to u" A<1,2> and U<2,1>: Find "A" as a sum of vector magnitude to "U" and perpendicular to "U". is that the question?

amistre64 · Answer

||A|| = sqrt(5)    ||U|| = sqrt(5)

find a vector with "2sqrt(5)", that is perpendicular to U<2,1> ?